If you talk to a back packer in different hotels daily for four days in a row he hands you an item called Strange Souvenir, which is native from his unknown region. Do any of you know if you can do something with the item?
The Strange Souvenir itself holds no importance, and its only purpose is to be sold. It's a reference to the Alola region, where the Strange Souvenirs originate from. All the item is is a hint towards the next generation.
Hope this helped!
